On September 6, NH Media explained what occurred, stating, "During filming for the MV, a smoke machine was used for Kiseop's scene, and it caused an explosion. He suffered 2nd degree burns, and 10 pieces of material were lodged in his body. He was transferred to a hospital in Incheon."

The agency continued, "It's a machine that's used often among civilians, at soccer matches, and at various festivals. We used it while filming for their music video, and it blew up. After receiving treatment at the hospital, Kiseop is currently resting."